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Proper implemetation of liquid flow node actions

This commit is contained in:
Wuzzy 2017-05-20 05:05:58 +02:00
parent 7ec501f779
commit 5f35bd2d2d
1 changed files with 42 additions and 59 deletions
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101
mods/ITEMS/mcl_core/functions.lua
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@ -94,80 +94,63 @@ local function drop_attached_node(p)
end
end
-- Remove attached nodes next to and below water (excluding diagonals)
-- TODO: This is just an approximation! Attached nodes should be removed if water wants to flow INTO that space.
-- Helper function for node actions for liquid flow
local liquid_flow_action = function(pos, group, action)
local check_detach = function(pos, xp, yp, zp)
local p = {x=pos.x+xp, y=pos.y+yp, z=pos.z+zp}
local n = minetest.get_node_or_nil(p)
if not n then
return false
end
local d = minetest.registered_nodes[n.name]
--[[ Check if we want to perform the liquid action.
* 1: Item must be in liquid group
* 2a: If target node is below liquid, always succeed
* 2b: If target node is horizontal to liquid, check param2 for horizontal flow direction ]]
if (minetest.get_item_group(n.name, group) ~= 0) and ((yp > 0) or (yp == 0 and n.param2 > (8-minetest.registered_nodes[n.name].liquid_range) and n.param2 < 9)) then
action(pos)
end
end
local posses = {
{ x=-1, y=0, z=0 },
{ x=1, y=0, z=0 },
{ x=0, y=0, z=-1 },
{ x=0, y=0, z=1 },
{ x=0, y=1, z=0 },
}
for p=1,#posses do
check_detach(pos, posses[p].x, posses[p].y, posses[p].z)
end
end
-- Drop some nodes next to flowing water, if it would flow into the node
minetest.register_abm({
label = "Detach dig_by_water nodes near water",
label = "Wash away dig_by_water nodes by water flow",
nodenames = {"group:dig_by_water"},
neighbors = {"group:water"},
interval = 1,
chance = 1,
action = function(pos, node, active_object_count, active_object_count_wider)
local check_detach = function(pos, xp, yp, zp)
local p = {x=pos.x+xp, y=pos.y+yp, z=pos.z+zp}
local n = minetest.get_node(p)
local d = minetest.registered_nodes[n.name]
if (d.groups.water) then
drop_attached_node(pos)
minetest.dig_node(pos)
return true
else
return false
end
end
local dug = false
for xp=-1,1 do
if check_detach(pos, xp, 0, 0) then dug = true; break end
end
if not dug then
for zp=-1,1 do
if check_detach(pos, 0, 0, zp) then dug = true; break end
end
if not dug then
for yp=0,1 do
if check_detach(pos, 0, yp, 0) then break end
end
end
end
liquid_flow_action(pos, "water", function(pos)
drop_attached_node(pos)
minetest.dig_node(pos)
end)
end,
})
-- Destroy some nodes next to and below lava (excluding diagonals)
-- TODO: This is just an approximation! Attached nodes should be removed if lava wants to flow INTO that space.
-- Destroy some nodes next to flowing lava, if it would flow into the node
minetest.register_abm({
label = "Destroy destroy_by_lava_flow nodes next to lava",
label = "Destroy destroy_by_lava_flow nodes by lava flow",
nodenames = {"group:destroy_by_lava_flow"},
neighbors = {"group:lava"},
interval = 1,
chance = 1,
action = function(pos, node, active_object_count, active_object_count_wider)
local check_destroy = function(pos, xp, yp, zp)
local p = {x=pos.x+xp, y=pos.y+yp, z=pos.z+zp}
local n = minetest.get_node(p)
local d = minetest.registered_nodes[n.name]
if (d.groups.lava) then
minetest.remove_node(pos)
minetest.sound_play("builtin_item_lava", {pos = pos, gain = 0.25, max_hear_distance = 16})
core.check_for_falling(pos)
return true
else
return false
end
end
local dug = false
for xp=-1,1 do
if check_destroy(pos, xp, 0, 0) then dug = true; break end
end
if not dug then
for zp=-1,1 do
if check_destroy(pos, 0, 0, zp) then dug = true; break end
end
if not dug then
for yp=0,1 do
if check_destroy(pos, 0, yp, 0) then break end
end
end
end
liquid_flow_action(pos, "lava", function(pos)
minetest.remove_node(pos)
minetest.sound_play("builtin_item_lava", {pos = pos, gain = 0.25, max_hear_distance = 16})
core.check_for_falling(pos)
end)
end,
})